Pipe joint



Patented F eb. 7, 1928.

UNITED STA'TES 1,658,100 PATENT OFFICE.

JACOBUS WILLEBRORDUS RIJNS, OIE EERLEN, NETHERLANDS.

PIPE JOINT.

Application filed December 23, 1926, Serial No. 156,631, and in the Netheflands October 9, 1925.

The invention relates to the making of pipe joints by means of socket and weld.

Pipe jointsflby means o a socket wero hitherto made principaily in two ways. v In the first and the older'methdd t-he straight end of a pipe is entered into the socket end of the next pipe after which the space between the straight pipe end and the socket is filled wit h tow and lead.

This method is cumbrous and expensive. With the progrss of the welding art recorse is had, in order.to obtain a simpler joint, to diret:tly welding the pipes together. In this second method, in which. a socket is also used for the joint, the socket directly engages the straight end of the next pipe. A chamber adapted to be filled up with tow and lead then remains and is superflous as theedge of this socket is welded directly to the pipe;

This second 'method bas, however, the drawback that it must be carried out with greatcare. Even if the workman fulfills his task very accurately he cannot prevnt the welding fiames from'aiecting the pipe itself to some extent. Consequently the wall of the pipe et the place of the weld becomes thin and weak. EVeD small leaks may be caused by the welding operation. A second .disadvantage of this method is that in pipas which are asphalted at the interior the local heating causes the asphalt of the pipe to run so that unprotected places are formed.

For these two reasons the conduits'in which the pipes are connected according -to .tensive control.

The invention is designed to overcome these disadvantages.

The basic idea of the prescrit inventipn.

consists in this that the weld is neither applied on,

of the pipe. Consequently the welding V flame cannot affect the pipe body and'there will be no rise of tempeiature, or at m ost but a small rise, 'whereby any local runnmg of the asphalt coating is prevented.

The socket joint is obtained by widening v nor in close proximity to, the wall or bending ont one end ofthe pipe conically somewhat as the usual socket but preferably at a smaller obtuse angle with the pipe body proper, While thecorresponding pipe end is bent se as to form a coller. This collar makes the same angle with the pipe body as the socket and is of about equa1 length therewith. The collar is nested in and therefore fits closely into the socket thereby 'forming a stable connection of the sections without the. use of bolts and the like and the dimensions may be so chosen that the edges of the socket and collar coincide. On or at this edge the weld is then applied.

In this way there 13 a certain distance be- A one form of my pipe joint.

Fig. 2 is a like view of a modified form of joint, and

Fig. 3 a like view of a further modified form.

Figure 1 shows a simple form of soket 1 and collar 2 With weld 3 connecting the socket and collar together at their outer edges. The angle is so chosen that, while retai1iing the tightness of the weld, a certain movability of one pipe With respect to the other is obtained. This is important in the i; akse of ground subsidence, repaire and .the

The same joint is shown in Figure 2 in which, howeVer, in order to avOid troublesomerecesss in the inner Wall of the conduit the -socket 4 is bent twice to forin a shoulder 5 whereby it engages also the bent edge 6 of the collar 2.

. Figure 3 shows an0ther embodiment of the joint.- The socket 7 and collar 8 are here curved more -or less so that the socket need not be benttwice for attaiflingapproximately. the same purpose.

These illustrated embodiments are not intei1ded to give a complete -summary'of the possible -embodiments seein that the inventien may be carried out in various other forms witho'ut basic idea.

I claim: V 1. A pipe joint comprising two pipe secdeparting from the stated tions each hving a conicn-l end portion, the end portion of onesection extending back 0V81 thc periphery thereof,and fitting the innor fico of the conicnl and of the othor section thereby forming a stable connection of the sections, and a w'eld binding the edges of the conical ends together.

2. A pipe joint comprising two pipe sections, one section having a flaring socket portion at the end thereof; the other section havinga flaring collar on one end extending backward from the latter and nested within the sockot end of the first secton thereby forming a stable connection of the sections, and a weid hinding the edges of the flaring vollar and socket.

3. A pipe joint comprising two pipe sections, one section having a flaring end portion forming an obtuse angle with the said section, the ofther section having a flaring and tornnng an angle w1th sa1d other sect0ll winch 15 a supplement to the obtuse angle, the fiaring ends of.the two sections be ing in nested relation theinby forming a stable connection of the sections, and a Weld binding the edges of the fiaring ends.

4. A pipe joint comprising two pipe sections, one section having a shoulder on one end terminating in a conical socket, the other section having a collar formed thereon at an acute angle theret, said collar being nested within the socket and abutting the shpulder thereof thereby forming a stable conection of the sections, and a weldbinding the edges of the socket and colla1.

In testunony whereof I nflix my signature.

JACOBUS WILLEBRORDUS RIJNS. 

